Adjustable spirit-level.



N0- 804,'792. PATENTED NOV. 14, 1905.

A. C. BRUNDAGE.

ADJUSTABLE SPIRIT LEVEL. APPLICATION FILED NOV. 14, 1904.

WITNESSES; INVENTOR 5 po WM Ohm b. fimma u ABRAM C. BRUNDAGE, OFNEWPALTZ, NEW YORK.

ADJUSTABLE SPIRIT-LEVEL.

Specification of Letters Patent.

Patented Nov. 14, 1905.

Application filed November 14 1904. Serial No. 232.747.

To all whom it may concern:

Be it known that I, ABRAM C. BRUNDAGE, a citizen of the United States ofAmerica, and a resident of the town of Newpaltz, in the county of Ulsterand State of New York, have invented certain new and useful Improvementsin Adjustable Spirit-Levels, of which the following is a specification.

My invention relates to. improvements in adjustable spirit levels orplumbs, and has special reference to that style of level or p umb usedby masons and also to that class of plumb which has one edge out on ataper that is, it is not parallel with the opposite edgefor use on workwhich is inclined at any required number of degrees from theperpendicular.

The object of my invention is to provide a simple, reliable, andinexpensive adjustable bubble-tube holder which can be inserted andsecured in the usual wooden level or plumb-stock and which does notrequire to be used in connection with a stock of special construction ordesign and also allows of the rapid removal of the tube-holder for theinsertion of a new bubbletube and provides for the simple and secureadjustment of the bubble-tube to the desired degree, which will be foundof special advantage in using the plumb on work that is inclined fromthe perpendicular.

The abovementioned and other objects are attained by the constructionand arrange ment of parts, as described in the accompanying drawings,and as set forth in this specification.

In the drawings, Figure 1 is a plan view showing one bubble-casearranged'for plumbing and the other for leveling, also one has theremovable cover on and the other shows it removed. Fig. 2 is a view ofthe edge of the plumb and bubble-case, showing the cover detached. Fig.3 is a sectional view of the case on the line a b, Fig. 1. Fig. 4 is aplan view of bubble-case, partly in section, showing construction ofparts.

Similar figures and letters indicate corresponding parts.

My invention as herein shown is attached to the usual Inasonsplumb-stock A, which has one edge parallel to a bubbletube, while theopposite edge diverges from the same bubble-tube. The edge surfaces areapplied to the work in using the instrument.

The circular openings B are formed in the stock'to receive thebubble-case C, which is formed as follows: v

The circular casing 9, of metal or other suitable material, is formedwith the flange 6 on the front or face side (which is used for securingit to the plumb-stock by the screws 14) and the protecting semicircularback casing 1 0, which forms a part of the back of said casing andbetween which is secured in a rigid manner the rectangular socket 4 orbase, which is provided with two holes 11, countersunk to receive thesquare-headed bolts 7 and 7 and is also formed with a rectangular holeor slot 12, into which is inserted the tongue of the rocker-arm 3, thatforms part of the bubble-tube 2, which holds the bubbleglass 1, saidrocker-arm'being secured to the socket 4 by the pin 5, which is held inplace by the strain upon it caused by the upward pressure of theadjusting-bolts 7 7 when forced upward by the screwing down of thelock-nuts 8, which are turned by a pin inserted into the holes 13,drilled into their outer edges.

The ends of the rocker-arm 3 are allowed to move up and down freely inthe slots 20, cut in the circular case 9.

There is also provided a removable flanged cover 15, that is attached byplacing the flange under the lugs 16 and is formed with a hole 17, thatwill freely pass over the head of the pin 5, and is secured by the smallslotted catch 18, that is passed between said cover 15 and the underside of the head of the pin Sand is held in place by the pin 19 in thecover 15. i

The adjustment and removal of the bubble-tube. are as follows: The pairof lock-nuts 8 on one side are loosened byturning them in an upwarddirection by a pin inserted in the holes 13. This will allow the bolt 7to release its pressure and drop slightly away from the under side ofthe rocker-arm 3, which allows said rocker-arm to rock slightly on thecenter pin 5, which, now relieved from the strain upon it, can be pulledout and the rocker-arm removed. By loosening one pair of locknuts 8 andtightening or turning down of the other pair the bolt 7 on the one sideis receded from the rocker-arm and the bolt 7 on the other side isforced upward, thus securing the rocker-arm at any desired degree. Thebubble-case C being placed about equi-distant from either ed e of thestock, it allows of the use of either t e straight or tapered edge ofthe stock. Also the bubble-case can be seen and read from either side orupside down.

A level constructed as herein described possesses great advantages inthe arrangement of the bubble-case for removal and adjustment and thereplacing of broken bubbletubes and the ad ustment of the instrument tothe desired lane or angle and the secureness with which it is held bythe lock-nuts.

Having thus described my invention, what I claim as new,'and desire tosecure byLetters Patent of the United States of America, is

1. In a spirit-levelor plumb, a bubble-tube case or holder, formed of ametallic circular casing, partly flanged on the face side, and partlyinclosed on the reverse side, and hav- ABRAM C. BRUNDAGE.

Witnesses:

DAVID M. MATHESEN, THOMAS MULLEN.

